Environment-friendly type high performance water vacuum plastics-absorption adhesive

Abstract

The invention discloses an environmental-protection type high-efficiency water-borne vacuum-formed adhesive which is characterized by comprising the following components with the following weight percentages: 30 percent to 50 percent of ethylene-vinyl acetate copolymer emulsion, 0.05 percent to 0.5 percent of organic amine, 1 percent to 10 percent of cross linker, 0.1 percent to 0.5 percent of leveling agent, 0.05 percent to 0.5 percent of polyurethane thickening agent and a polyurethane latex accounting for the rest percentage. The adhesive can be preserved for a long time, with high-temperature resistance thereof reaching over 80 DEG C. And the adhesive not only reduces complicated procedures in operation links, but also decreases the usage of a curing agent, thereby reducing the manufacturing cost.

Description

technical field [0001] The invention relates to a vacuum plastic absorbing adhesive, in particular to an environment-friendly high-performance water-based vacuum absorbing plastic adhesive. Background technique [0002] Vacuum suction plastic general use process: spray glue onto the surface of the MDF board by spraying glue, let it stand until the moisture in the glue layer evaporates and dries to form a film, then place the glued MDF on the vacuum suction machine , Cover the PVC decorative film on the surface of the MDF by heating and vacuuming. At this time, the adhesive layer on the surface of the MDF is activated by heat to produce polar cross-linking with the PVC film to achieve an adhesive effect. The main indicators of vacuum plastic in the application process are: (1) bonding strength; (2) high temperature resistance; (3) surface smoothness. [0003] Vacuum suction plastic currently used in the bonding of PVC film and MDF. The temperature resistance of single-compo...

AI Technical Summary

Problems solved by technology

The temperature resistance of single-component finished products is only 65°C. For some exported products, they often need to be transported in closed containers. Especially for ships that need to cross the equatorial circle, the temperature inside the container can reach 80-90 ℃, if the high temperature resistance of the glue is not enough, it is easy to cause the PVC decorative leather to peel off, and the product will be scrapped

The previous practice is to add 3-5% curing agent to improve the heat resistance during the use of glue, but this increases the production process from another angle, increases the production cost, and is not conducive to wide application

[0004] For the finished products made of PVC decorative film bonded with MDF, the early stage only emphasized the requirements of bonding strength and high temperature resistance. With the continuous development of the industry, especially the development of the indoor paint-free door industry, more and more manufacturers In addition to the requirements of adhesive performance, more and more attention is paid to the appearance of indoor paint-free doors, because the traditional operation process is to spray glue on the MDF in the way of spraying. Considering the high surface tension of water glue, the flow The leveling effect is not good, and it is easy to form pits on the part where the glue is concentrated, resulting in the phenomenon of "orange peel"

After the PVC skin is adsorbed on the board surface, the appearance of the film reflects the apparent state of the adhesive layer. It is the case that the PVC surface also has pockmarks, which greatly reduces the aesthetics of the finished product.